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  • Title: The trajectory of psychiatric disorders in young people with intellectual disabilities.
    Author: Tonge B, Einfeld S.
    Journal: Aust N Z J Psychiatry; 2000 Feb; 34(1):80-4. PubMed ID: 11185949.
    Abstract:
    OBJECTIVE: This study addresses the question of how prevalence and patterns of psychiatric disorder change from childhood to adolescence in young people with intellectual disability (ID). METHOD: A representative epidemiological sample of 582 young people with ID aged 4-19 years was surveyed in 1991-1992 and again in 1995-1996. The main measure of psychiatric disturbance was the developmental behaviour checklist (DBC), a 96 item parent/carer completed questionnaire with robust psychometric properties which provided an overall score, 6 subscale or syndrome measures of psychiatric disturbance and determined caseness. RESULTS: The findings confirmed that about 40% of young people with ID had psychiatric disorders which persisted over 4 years. Clinically significant change in symptoms with either deterioration or improvement occurred in around 14% of the sample. CONCLUSION: Psychiatric disorder is 3-4 times more prevalent in young people with ID than in the general population. Less than 10% of these young people receive specialist services for a problem which is numerically as large as schizophrenia.
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